Bump fire stocks enable semi-automatic weapons to operate in a capacity similar to automatic weapons.

Police discovered a dozen bump fire stocks in the hotel room of the Las Vegas shooter.

Congressmen Carlos Curbelo (R-Fla.) and Seth Moulton (D-Mass.) said in a joint statement Thursday that they are working together to forge bipartisan consensus on legislation that would ban bump fire stocks.

House Speaker Paul Ryan (R-Wis.) on Thursday told MSNBC that he was not familiar with bump fire stocks prior to the mass shooting in Las Vegas but said of potential legislation banning the mechanism: “Clearly that’s something we need to look into.”